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AUTOS: Guardian to shut plant in Warren

Guardian Automotive Inc., a supplier of automotive glass and exterior trim parts, will shut a plant in Warren at the end of August because of declining U.S. sales of cars and trucks.

The closing will result in layoffs for 78 employees, Amy Hennes, a spokeswoman for the Auburn Hills-based supplier, said Thursday. The company is part of Guardian Industries Corp., owned by Bill Davidson, who also owns the Detroit Pistons basketball team. "There has been a decline in auto sales, resulting in production cuts," Hennes said. The plant makes stamped-metal parts and trim components.